Color image processing apparatus for generating color output sig

Details Color image processing apparatus for generating color output sig Color image processing apparatus for generating color output sig

1983-10-04

1987-02-10

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 75, G03F 308, H04N 146

Patent

active

046426817

ABSTRACT:
A color image processing apparatus includes a signal generator for generating color signals representative of at least three color components, each having a density level, for one pixel. A detector detects a specific color having a density level exceeding a predetermined density level by detecting the signals representative of the three color components and generates a specific signal representative of that specific color. A first processor is responsive to the color signals to conduct half-tone reproduction processing of the color signals to output color output signals. A second processor is responsive to the specific signal for outputting a signal of a predetermined level. Finally, a prohibiting device prohibits the output of the color output signals by the first processor when the second processor outputs the signal of the predetermined level. In a preferred embodiment, the specific color is black. The apparatus can reproduce an image including a half-tone portion and a character or line portion with excellent halftone reproduction characteristics and excellent sharpness of the character or line portion.

REFERENCES:
patent: 3109884 (1963-11-01), Zeyen
patent: 3209070 (1965-09-01), Mawby
patent: 3560757 (1971-02-01), Pugsley
patent: 4415920 (1983-11-01), Kato et al.
patent: 4482917 (1984-11-01), Gaulke et al.

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